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How many rows of A contain a pivot position? Does the equation Ax=b have a...

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Algebra

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How many rows of A contain a pivot position? Does the equation Ax=b have a solution for each b in R4?A =1-2 -20-23 -7114- 25 - 1001 - 62How many rows of A contain a pivot position?A has rows which contain a pivot position.

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